NOK100-01 = 12 O-RINGS & BOLT KIT FOR 1995 -1997 7.3L PSD NOK100-01A = 12 O-RINGS & BOLT KIT & HOSE KIT FOR 1995 -1997 7.3L PSD (SEE "THE FUEL LEAK GENERAL INFO TAB" FOR MORE INFO ON THE HOSES) NOK100-01B = 12 O-RINGS & BOLT KIT & HOSE KIT & SNAP RING FOR 1996 & 1997 ONLY (1995 DOES NOT USE THE SNAP RING ORDER NOK100-01A) (SEE "THE FUEL LEAK GENERAL INFO TAB" FOR MORE INFO ON THE HOSES)